Diagnostic Aids
WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 GMC Sierra, 2002 Chevrolet Suburban, and 2002 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
If the TCC is mechanically stuck on with the parking brake applied and any gear range selected, the TCC fluid mechanically applies the TCC. TCC fluid mechanically applying the TCC can cause an engine stall.
DTC P0742 defaults to an elevated line pressure condition which may result in TCC partial apply. This may induce idle surge and engine stall.
A stuck TP sensor may set a DTC P0742.